Convert sass files to scss files

sass/form/checkbox-radio.scss

@@ -0,0 +1,33 @@
+%checkbox-radio {
+  cursor: pointer;
+  display: inline-block;
+  line-height: 1.25;
+  position: relative;
+
+  input {
+    cursor: pointer;
+  }
+
+  &:hover {
+    color: $input-hover-color;
+  }
+
+  &[disabled],
+  fieldset[disabled] &,
+  input[disabled] {
+    color: $input-disabled-color;
+    cursor: not-allowed;
+  }
+}
+
+.checkbox {
+  @extend %checkbox-radio;
+}
+
+.radio {
+  @extend %checkbox-radio;
+
+  & + .radio {
+    @include ltr-property("margin", 0.5em, false);
+  }
+}